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All Blog Posts for monitoring


  • Icinga 2 - monitor AWS EC2 instances dynamically

    Icinga 2 - monitor AWS EC2 instances dynamically

    Now days it is a challenge to monitor instances which are created/deleted on the fly (instances in auto scaling group for example), so how we could accomplish this with Icinga 2? Well, in this blog we will provide some hints, how to have such configuration without writing complicated AWS CLI/API calls or lambda functions, but configuring mainly icinga.

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  • Icinga2 Fine-Tuning

    Icinga2 Fine-Tuning

               Icinga2 is a great tool built upon the foundation of the well known Nagios monitoring, inheriting all the pros it has to offer. With many plugins available in your repository and thousands more in the community-driven Nagios-exchange website, icinga2 is a very good choice for your infrastructure monitoring. I will cover some of the optional features that can be tweaked to suit your needs, once the main configuration has been set up. Some of the points are: Taking full advantage of variables defined in your Host file. Setting up custom scheduled downtimes. Changing the timeout for specific checks. Using a different user for your checks. Writing your own plugin.

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  • Monitoring Openstack Part 2

    Monitoring Openstack Part 2

    In my previous blogpost I was discussing how to monitor RabbitMQ as a centralized message Q of Openstack. Well, that's quite important but the end goal of having cloud are the instance on top of the machine. Most of you and especially the infrastructure guys who dig into monitoring will know what are the most important components to look over.The reason to monitor is to have reasonable planning which is probably the drill in cloud environment where you have spawnlarge number of virtual machines of containers. On the other hand having the data in one glance is very easy to increase the reliability, uptime plan better your architecture and identify the bottlenecks of your setup.

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  • Oracle Database – Monitor with nagios using check oracle health

    Oracle Database – Monitor with nagios using check oracle health

    This tutorial explains how to set-up the check_oracle_health script (credits to Gerhard Lausser) to work on your Nagios environment on CentOS (or any RedHat based Linux). This nagios plugin allows to monitor many oracle DB parameters – like tablespaces size, session, process count, SGA pool etc. Check it out on the author’s webset.The hardest part of the setup is installing the dependent perl libraries and making modifications in the perl code for them to work.On oracle server we need to create the monitoring user and grant rights, only the minimum necessary for the script to work.

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  • Monitoring Openstack Part 1

    Monitoring Openstack Part 1

    Last year we focused on the Openstack technology and the projects behind it. We decided to stress on it and move our scope in that direction because of the rich features and flexibility that it provides. But as we know great power comes with great responsibility.

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